Bruce, I hope that you consider imitation to be the greatest form of flattery!

Your videos and one by Jim inspired me to attempt building my windmill. (Including painting the tips of the blades.) I had never seen the one with all five windmills running at once. Very cool.
Have you dialed in on an optimal pulley diameter for your builds? I can't do any custom machining myself so I'll have to purchase the remaining parts for my build and wing the rest. What do you recommend? Thanks.